Stroke-multiplying parallel-motion device



May 26, 1925. 1,539,343

. E; B. WIN TERS STROKE MULTIPLYING PARALLEL MOTION DEVICE File y 29, 1924 z sheets-sheet 1 IIVVEAfTO/P fdimm/ 5i Pill/#6115;

ATTORNEY May 26, 1925. 1,539,343

E. B. WINTERS STROKE MULTIPLYING PARALLEL MOTION DEVICE Filed y 9, 1924 '2 Sheets-Sheet 2 Patented May 26, 1925,

UNITED STATES EDWARD B. WINTERS, OF COFFEYVILLE, KANSAS.

STROKE-MULTIPLYING PARALLEL-MOTION DEVICE.

Application filed May 29, 1924. .Serial No. 716,808.

To all whom it may concern Be it known that I, Enwann B. W'INTERs, a citizen of the United States. residing at tofieyvillc. in the county of Montgomery and State of Kansas, have invented certain new and useful Improvements in Stroke Multiplying Parallel-Motion Devices; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to yvhich it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to a stroke multiplying device designed for providing a relatively long stroke to a reciprocatory member to be actuated and the inventioncomprebonds the provision of means for providing what is commonly known as a parallel motion so that the reciprocatory movement will be maintained in a substantially straight line, this being important in certain arts, as

for example in pumping oil wells.

The invention is illustrated as applied to an oil well rig but in its generic aspect it is capable of other uses such as a pumping jack or wherever a relatively long stroke reciprocatory motion is to be provided. I therefore do not wish to be limited entirely to the use of the device in connection with the oil well industry. Such a device is important however in the oil well industry because the pump rods usually receive their motion from the walking beam of the drill rig. In view of the fact that the walking beam receives its motion from the crank on the band wheel and in view of the fact that a relatively short crank is used in drilling, it will be apparent that the reciprocations of the drill rods are relatively short, therefore in order to obtain production, the pumping apparatus must be operated at a. relatively rapid rate. When this is done, the rods buckle and crystallize so that they part, necessitating shut downs while repairs are being made. In fact this is SIM-l1 a common practice that it is not unusual for the rods to part once every 24 hours, with a consequent result of loss in production during the time that repairs are being made.

With my invention, the pump rods may be operated so as to provide a stroke for the pump piston of from sixty inches'to onehundred twenty inches, at from 8 to 16 strokes per minute, as against the present practice where the stroke of the pump piston is from 14 to 36 inches and operated from to 40 strokes per minute. Therefore it will be seen that with the old style practice the whipping of the rods must ensue" whereas with the long slow motion, not only will increased production be provided, but the tendency for the rods to whip and crystallize will be reduced to a minimum.

Long stroke pumping mechanisms are of comparatively recent origin, their necessity being due largely to the fact that. deeper wells are being drilled and to the fact that many oil producing wells haveconsiderable water and unless a greater amount of fluid 1s pumped from the well, the oil recovered Wlll not pay for operating the well. It is not my intention to representthat with my invention the liability of the rods parting will be wholly eliminated because I believe that it will be impractical to entirely eliminate the parting of the rods but I do claim that with my invention the partingof the rods will be considerably less-frequent than with the standard pumping outfit. I- have therefore provided means whereby the power delivering means to be connected to the pump rods can be swung out of the way of the pump rods when it is necessary to pull them and I have provided the parallel motion so that there will be direct strai ht pull on the pump rods which will give greater economy in power consumption'than mechanisms where the pull deviates materially from a straight line and by maintaining the pump rods substantially in the center of the well, liability of their slapping against the tubing will be entirely eliminated.

The novelty of the invention as well as its practical application will be apparent by reference to the following description in connection with the accompanying drawings, in which Fig. 1 is a perspective view of a portion of a well drill rig to which my invention is applied.

Fig. 2 is an enlarged fragmentary eleva tional view of the front end of the walking beam, the multiplying parallel device being shown partly in section, and

Fig. 3 is a side elevational view of the front end of the walking beam showing the multiplying parallel device swun out of functional position so that it will e out of line with the be pulled.

Referring now to the drawings, by numerals of reference 1 designates the band wheel which receives its motion from an appropriate prime mover (not shown) through the medium of the belt 2. The band wheel is carried on the crank shaft 3 supported by the jack posts 4, the shaft 3 carrying the usual crank 5 connected to the pitman 6 which in turn is con nected to the rear end 7 of the walking beam 8 mounted to swing on the Samson post 9.

All of the previously described mechanism is standard equipment. The stroke multiplying parallel motion is illustrated as comprising a truss beam consisting of two pump rods to permit them to channels 10 and 11 connected in spaced relation by tie-bolts 12 and 13 so that they may be on opposite'side's ofthe'walking beam. The channels 10 and ll'when they are connected constitute the compression member of a truss, the tension members 14 and 15 being connected to a substantially U-shaped strut 16 which is adapted to straddle the front end of the walking beam 8, the strut serving also as a U-bolt or bracket which supports the truss upon the front end of the walking beam through the mediuln of the bolt 17- which removably passes throughthe upper ends of the strut. The trussis also permanently fastened to the walking beamby the bolts 18 and 19 and the strap 20 held on the bolts by the nuts 21 and 22. I

The truss constitutes an extension for the walking beam and at its front end on the bolt 13 is an elbow lever 23 pivoted at its angle upon the bolt 13. The toe of the horizontal leg 24 of the lever 23 is directed toward the front endor toe of the walking beam 8. The substantially vertical leg 25 of the elbow lever 23 is connected to compensating links or rods 26 and 27 by a bolt 28, the compensating links or rods 26 and 27 being anchored to the Samson post 9 by the an-, chor member 29 fastened to the Samson post by the clevis or yoke 30 which may be of any appropriate construction. The elbow lever may be braced by the braces 31 or the elbow lever consisting of the legs 24, 25 and braces 31 may be cast in a single piece in which event the legs would be braced by a web. The specific construction of the elbow lever is unimportant in the generic aspect of the invention for obviously it could be in the form of an an le plate if heavy enough metal was used.

receive the T-shaped end 33 of the polish rod 34 connected to the pump rods in any appropriate manner.

It will be apparent that since the forward end of the bracket or truss extension is pivdirect per endicular pull.

he forward end of the elbow lever is provided with a socket 32 to and the pivot 13 moves outwardly the pivot 28 will move inwardly a corresponding amount and vice versa, therefore the front end of the elbow lever will move in a sub;

stantially vertical line throughout the entire swing of the walking beam.

In actual practice there may be a slight deviation from a straight line but for all intentions and purposes the pull will be a In view of the fact that t e power delivering element, that is the elbow lever is pivoted to the extended end of the truss and in view of the fact that it has a motion independent of the motion of the walking beam, it will follow that the stroke in addition to being in a straight line will have a greater amplitude than if the pump rods were driven direct from the front or toe end of the walking beam. Consequently a longer stroke will be imparted to the working barrel of the pump on the ends of the pump rods.

I have above intimated it is necessary to pull-the pump rods periodically so in order to provide a convenient means for pulling them, the truss is pivoted to the bolt 12 by disconnecting the rods 26 and 27 and taking out the bolt 17 and the truss with its ill) wardly, therefore the front end of the walking beam will be out of line with the rods so that they can be pulled in a convenient manner. I

From the foregoing, it-will be apparent that the device constructed in accordance with the generic principles hereinbefore enumerated will give an increased stroke with a parallel motion so that the pump rods will not whip or crystallize as readily as they will under standard practice and in view of the fact that the stroke ofthe working barrel of the pump can be increased, that production must of necessity be increased with a slower motion than that usually practiced and that the device can be applied to astandard rig Without in any way altering the rig. This feature alone is important due not to any inability of workmen to arrange or reconstruct the rig, but because of the inherent prejudice of oil operatives to change standard equipment with which they are familiar.

While this invention is primarily intended for use as a long stroke parallel motion device for oil pumps, I comprehend that it is capable of other uses and I therefore do not wish tobe limited to the specific application illustrated.

\Vhat I claim and desire to secure by Letters-Patent is:

1. In a stroke multiplying parallel motion device, a rocking beam, an elbow lever pivoted to one end of the beam at the angle of the elbow lever and compensating means having one end anchored and the other pivoted to one arm of the elbow lever.

2. In a stroke multiplying parallel motion device, a rocking beam, an elbow lever pivoted to one end of the beam at the angle of the elbow lever and compensatin means having one end anchored and the ot er pivoted to one arm of the elbow lever, the pivots of the elbow lever describing intersecting arcs to maintain the end of the free arm of the elbow lever in a straight line during the movement of the beam.

3. In a stroke multiplying parallel motion device, a rocking beam, a normally rigid pivoted extension on the end of the beam, an elbow lever pivoted at the angle of the elbow lever to the extension, the elbow lever having a depending arm and compensating,

means anchored at one end, removably and pivotally connected to the free'end of the depending arm so that the compensating means may be detached from the arm and of the beam, an elbow lever pivoted at its angle to the extension, and compensating means pivotally anchored to the post and pivotally connected to the free end of one arm of the elbow lever.

5. Ina stroke multiplying parallel motiondevice, a. rocking beam, an extension pivotally secured to the rocking beam, means for'fastening the extension rigid with the beam, an elbow lever pivoted atits angle to the extension and having onearm directed toward the free end of the beam and a compensatin'g device anchored at one end and removably connected to the free end of the other arm of the elbow lever.

6-; In a stroke multiplying parallel motion device, a supporting member, means for attaching the supporting member to a rocking beam, an elbow lever pivoted at its angle to the member, said elbow lever havingasubstantially horizontal arm and a substantially vertical arm, means on the horizontal arm for engaging a device towhich power is to be applied and a compensating means having an anchor at one endand a pivoted connection at the other end with the free end of the vertical arm of the elbow lever.

7. In a stroke multiplyi 1g parallel motion device, a truss, means on one end of the truss for fastening the truss to a rocking beam, means intermediate the truss for engagement with the end of the beam, an elbow lever pivoted at its angle to the free end of the truss, rods pivotally connected to the free end of one of the arms of the elbow lever and anchoring means at the other ends of the rods.

\ In testimony whereof I afiix my signature.

EDWARD B. WINTERS. 

